1.5k armor refers to a set of armor that usually costs 1.5 platinum per piece to craft. These sets can be crafted beginning in Droknar's Forge, and have the best stats among their own type of armor. Note that even though 15k armor sets exist, each 15k armor set is identical, stat-wise, to a 1.5k armor set; the only difference is in their appearence.
Monk tattoos and Necromancer scar patterns cost 800
instead of 1.5
, but are still often considered 1.5k armor.
Because 1.5k armor is first found in Droknar's Forge, this category of armor is typically referred to as "Droknar's armor".
In the Factions campaign, 1.5k armor are available starting in Kaineng City.